The basic information you need is this: Any time a program asks for a “mail server” (whether that is incoming, outgoing, or whatever), the answer is mailbox.nova.org. Any time you need a user name for email, it will always be your full email address (e.g., example@nova.org).

These how-to guides can help. Remember the server name is always mailbox.nova.org, not the server name shown in the guides. Your username is your email address, which *might* be @nova.org, or it might not be.